Mitogenomic phylogeny, biogeography, and cryptic divergence of the genus Silurus (Siluriformes: Siluridae)

文献类型： 外文期刊

第一作者： Chen, Weitao

作者： Chen, Weitao;Li, Yuefei;Zhu, Shuli;Xiang, Denggao;Gao, Shang;Wu, Junjie;Li, Xinhui;Li, Jie;Chen, Weitao;Li, Yuefei;Zhu, Shuli;Li, Jie;Chen, Weitao;Li, Yuefei;Zhu, Shuli;Li, Jie;Chen, Weitao;Li, Yuefei;Zhu, Shuli;Li, Jie;Hubert, Nicolas;Wang, Jun;Wang, Chunni Kou Jilong;Wang, Tai;Liang, Zhiqiang;Wu, Junjie

作者机构：

关键词： Maximum likelihood; Bayesian inferences; Ancestral area estimation; Cryptic diversity; Dispersal pathways; Mitogenomes; Sea levels

期刊名称：ZOOLOGICAL RESEARCH （ 影响因子：4.0； 五年影响因子：4.5 ）

ISSN： 2095-8137

年卷期： 2024 年 45 卷 4 期

页码：

收录情况： SCI

摘要： The genus Silurus , an important group of catfish, exhibits heterogeneous distribution in Eurasian freshwater systems. This group includes economically important and endangered species, thereby attracting considerable scientific interest. Despite this interest, the lack of a comprehensive phylogenetic framework impedes our understanding of the mechanisms underlying the extensive diversity found within this genus. Herein, we analyzed 89 newly sequenced and 20 previously published mitochondrial genomes (mitogenomes) from 13 morphological species to reconstruct the phylogenetic relationships, biogeographic history, and species diversity of Silurus . Our phylogenetic reconstructions identified eight clades, supported by both maximum-likelihood and Bayesian inference. Sequence-based species delimitation analyses yielded multiple molecular operational taxonomic units (MOTUs) in several taxa, including the Silurus asotus complex (four MOTUs) and Silurus microdorsalis (two MOTUs), suggesting that species diversity is underestimated in the genus. A reconstructed timecalibrated tree of Silurus species provided an age estimate of the most recent common ancestor of approximately 37.61 million years ago (Ma), with divergences among clades within the genus occurring between 11.56 Ma and 29.44 Ma, and divergences among MOTUs within species occurring between 3.71 Ma and 11.56 Ma. Biogeographic reconstructions suggested that the ancestral area for the genus likely encompassed China and the Korean Peninsula, with multiple inferred dispersal events to Europe and Central and Western Asia between 21.78 Ma and 26.67 Ma and to Japan between 2.51 Ma and 18.42 Ma. Key factors such as the Eocene-Oligocene extinction event, onset and intensification of the monsoon system, and glacial cycles associated with sea-level fluctuations have likely played significant roles in shaping the evolutionary history of the genus Silurus .

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